JPS60109675A - Air sump exhauster in convex pipeline for fluid - Google Patents

Abstract

PURPOSE:To reliably exhaust without an air vent pipeline or a vacuum pump by providing a stage tank for always taking out air contained in a fluid by utilizing the theory of siphonage. CONSTITUTION:A fluid and air bubbles which are forced to flow in from a suction pipeline duct D-1 through an induction pipe 6 by sucking force of a water pump P and siphonage first collide with the inner wall of an outer cylinder 1. Subsequently, the fluid and air bubbles suddenly change their flowing direction at the upper end of a suction nozzle 4 to flow into the suction nozzle 4 and take out the air bubbles with the fluid completely without leaving air in a stage tank A. In order to improve an effect of taking out air in case of small quantity of water, the induction pipe 6 is fixed off the center of an outer cylinder of the stage tank A to be eccentric to the tube side wall.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for exhausting air pockets provided at the top of a fluid water pipe when it is unavoidably laid in a middle or high part of a mountain range due to topographical or structural reasons.

When constructing a full-flow pipe for fluid, if the pipe is horizontal or slopes upward in the flow direction, air contained in the fluid can be taken out, but due to topography and structure, it is unavoidable to use a medium-high shape over a mountain. In this case, the air contained in the fluid accumulates at the top of the tube, blocking the cross-sectional area of the tube, increasing the resistance of the tube, and reducing the flow rate, so the air trap becomes an obstacle.

Normally, in the case of pressure piping such as water pipe bridges, air valves (exhaust valves) are installed in the pipes to eliminate air pockets. Since it was impossible to use a valve, an air bleed pipe was installed at the top of the pipe, and an external vacuum pump of the water pump was installed as an auxiliary device to drive forced exhaust continuously or intermittently.

According to this system, it is essential to install a vacuum pump as an auxiliary machine in addition to the main water pump, which has disadvantages such as increased equipment costs and operating power costs.

Therefore, this invention uses a self-priming water pump and provides a stage tank that constantly takes out the air contained in the fluid using the principle of siphon action without continuously or intermittent operation of the air vent piping and vacuum pump as described above. It is something to do,
A flange is fixed to the upper part of an upright cylindrical outer cylinder, a blind cover is attached to this, a cylindrical suction nozzle of an appropriate diameter is fixed upright at an appropriate distance from the lower surface of the blind cover at the lower part of the center of the outer cylinder, The introduction pipe of the stage tank, which is formed by fixing an introduction pipe of an appropriate diameter and an inlet flange to an appropriate location on the side surface of the outer cylinder, is connected to the outlet of the suction pipe duct in the fluid Yamakoshi medium-high piping, and the lower end of the suction nozzle is The present invention provides an air pocket exhaust device connected to a suction pipe of a pump.

An embodiment of the present invention will be described below based on the drawings. A flange (2) is fixed to the upper part of an upright cylindrical outer cylinder (1) and a blind lid (3) is attached to this. A suction nozzle A/(4) of a cylindrical shape with an appropriate diameter (revised-1) is erected at an appropriate distance (h) from the lower surface of the outer cylinder (1), and fixed to the lower part of the center of the outer cylinder (1). Insert the inlet 7 into the appropriate location of the inlet (5) and the appropriate diameter (d-2) inlet pipe (
6) of the stage tank fixed to the suction piping duct (D-1) in the Yamakoshi medium and high fluid piping
) and the lower end of the suction nozzle (4) is connected to the suction pipe (D-2) of the pump (P).

In the drawing, (6) is the intake well.

Next, to explain the present invention in detail, the suction pipe (D-1
) through the introduction pipe (6), the fluid and air bubbles flow into the outer cylinder (
1) Impacts the inner wall of the suction nozzle (4), suddenly changes the flow direction at the top tip of the suction nozzle (4), and flows into the suction nozzle (4), completely removing air bubbles along with the fluid without leaving any air inside the stage tank. It is. In this case, experiments have shown that the diameter of the inlet pipe (6) (cl-2) and the diameter of the suction nozzle (4) (
a-1) Suction/slip (4) from the bottom of # and blind lid (3)
Make the upper distance (h) the same dimension and roughly suck/slip (
When the cross-sectional area of 4) and the annular area of the outer cylinder (1) are the same, the flow velocity of the fluid in each pipe is equal, and the fluid and air bubbles flow into the suction nozzle (4), completely draining the air in the stage tank. I was able to confirm the effect of taking them out. In addition, in order to improve the effect of air extraction in the case of a small amount of water, the introduction pipe (6) is installed at a position off the center of the tube of the outer cylinder of the stage tank and introduced eccentrically to the side wall of the tube, thereby creating a vortex flow due to the water head. A good air extraction effect was obtained.

As described above, according to the present invention, when it is unavoidable due to topographical or structural reasons to lay piping in the middle or high part of a mountain to pump water, by installing a stage tank with a simple structure, a vacuum pump can be used as an air valve or an auxiliary machine. This eliminates the need for the installation of pipes, which reduces operating costs, and by utilizing the principle of siphon action when taking water from rivers, the sea, etc., the actual suction head is reduced and the pipes can be laid in the shape of medium-high pipes, making it possible to eliminate civil engineering work such as digging of embankments. It can be omitted, it is safe from a flood control perspective, it also avoids restrictions on the location of the pump, which saves construction costs, and it also has many benefits, such as the ability to completely remove air and satisfies the water pumping function. This is an air trap exhaust device for medium-high piping.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view showing a partial cross section of the entire device, Fig. 2 is a plan view of the stage tank with the blind lid removed, and Fig. 3 is a vertical cross section of the stage tank. It is a diagram. 1... Outer cylinder 2... Flange 3... Blind lid 4.
・・Suction nozzle 5・・Inlet flange 6−・
・Introduction pipe...Stage, tank d-1...Suction nozzle diameter d-2...Introduction pipe diameter h...Distance between suction nozzle and blind cover D-1...Suction pipe duct) D
-2... Suction pipe P... Lifting pump W... Water intake well patent Applicant Oshima Justice procedure amendment written by Kanrei August 5, 1980 Patented in 1982 Patent Junro No. 216894 2 Name of the invention Air pocket exhaust device for mid-high fluid piping 3 Related to the case of the person making the amendment Patent applicant 4 / agent Ko, Mi 1λ version 5 SO 8, contents of the amendment as shown in the attached sheet

Claims (1)

[Claims] A flange is fixed to the upper part of an upright cylindrical outer cylinder, a blind cover is attached to this, a cylindrical suction nozzle of an appropriate diameter is fixed upright at an appropriate distance from the lower surface of the blind cover at the lower part of the center of the outer cylinder,
Roughly, an inlet pipe of an appropriate diameter and an inlet flange is fixed to an appropriate location on the side surface of the outer cylinder.The inlet pipe of the stage tank is connected to the outlet of the suction pipe duct in the fluid Yamakoshi medium-high piping, and the lower end of the suction nozzle is connected to the inlet pipe of the stage tank. An air pocket exhaust device that is connected to the suction piping of a water pump.